Valve



Oct. 29, 1929. P. R. G. BIEDERMANN VALVE Original Filed March 14, 1927 INVENTOR. B426. fi/eoermanrz A TTORNE) Patented Oct. 29, 1929 OFFICE;

PAUL R. G, B IEDEIRMANN, 01F LOS AN GELES, CALIFORNIA VALVE Application filed March 14, 1927, Serial No. 175,158. Renewed March 25, 1929.

'My invention relates to valves and seats therefor, adapted for special use in connection with slush pumps used in oil well practice, said invention being especially devised for use in deep drilling. f

In practice it has been found that in deep drilling where a valve provided With a resilient insert is used, that under pressures exceeding 500 pounds per square inch there is a v i tendency to force said insert from the cap of the valve. By the use of my invention this defeet, as repeatedly demonstrated in practice, is effectively overcome, said valves in actual operation having successfully withstood 5 pressures exceeding 1200 pounds per square inch without the insert being blown out.

It accordingly is an object of my invention to provide a novelform of valve comprising an internally taperedcap in which is clamped,

by means of a frusto-conical sleeve or washer,

a hollowed out internally tapered annular insert, preferably formed of resilient material,

the bottom of which is covered substantially in the shape of a quarter of a circle.

It is also within the-province of my inven tion to provide anovel form of valve seat, preferably of cylindrical form and equipped with a. tapered cut-away portion defining a being provided with 'concaved and convex portions, said seat being thereby absolutelynon-scoring.

The above and further-objects and advantages of my invention, as will hereinafter more fully appear, I attain by the device con- 40 structed in accordance with the description and drawings forming a part of this application. i

Reference is had to the accompanying drawings inwhich similar reference characters denote similar parts. In the drawings,- Fig. 1 is a fragmentary vertical sectional view through myimproved valve andseat therefor, H Fig. 2 is a somewhat enlarged bottom plan view of the valve seat, and I curved ledge for checking the'velocity of theflui-d as it enters said inlet, so that said fluid Fig. 3 is a fragmentary cross-sectional de' tail of the valve and its seat illustrating the manner in which the insert begins to seat on the seat of the valve.

Describingmy invention more in detail,

cons'iderable'trouble has been found in prac-' tice, where valves with resilient or rubber composition inserts, are used, in the insert beto the insert, effectively preventing the deleterious efiect.

To this end, I provide a novel form of valve seat 2, comprising a preferably cylindrical member 4, cut-awayas at 6, to provide a tapered fluid inlet, and also defining a ledge 8 adapted to check the velocity of the entering fluid, and also so as to direct said fluid to the insert 10 of the valve 12, hereinafter 76 more particularly described, so that scoring of the seat of the valve is effectively prevented.

The seat 14 is provided with a concaved portion 16 and a convex portion 18, shaped as 80 shown, to provide for an accurate seating of the valve 12, and to prevent the lodging of ebbles, grit, sand and the like, between the insert 10 and the seat 14. The bottom of the seat 14 isprovided with a bridge portion 20., preferably shaped as shown, andequipped with a perforation 22.to receive the stem 24 ofthe valve, a bushing'26, if desired, being provided to prevent wear.

The valve 12 comprises a cap 28, tapered internally as at 30, for the reception of the top'portion of the resilient insert 10, to assist in preventing the forcible removal of said insert from said cap when the valve is subjected to excessive pressures, as in deep drilling, saidcap being also equipped with a threaded cavity- 32 in the projection 34 for the reception of the valve stem 24.

As hereinbefore explained, the insert 10 is of annular form, and is internally tapered as 1 at 36, for the reception of the clamping washer or sleeve 38, which is flanged as at 40,

which flange is equipped with teats or proj ecdevice 46. serving to tighten the sleeve or opposed, so that insert having an upper washer 38 so as to hold the insert 10 in the cap 12. The tapered portions 30 and 36 etfectively prevent the forcible removal of the insert 10 from the cap'12at all pressures to which the valve may be subjected.

The annular insert 10 is provided with a hollowed-out or cut-away portion 48, thereby, when said valve is assembled, forming an air cushion, functioning when saidvalve is seated to eject or dislodge any sand, grit pebbles or the like that may become lodged between the valve and its seat. The tapered portions 30 and 36 are directly when the washer or sleeve 38 is drawn up by the nut or other device 46, there is a tendency to'expand the insert, forcing it tightly into the tapered portion 30 of the cap 12, thus preventing any possibility of the insert 10 being blown out of said cap.

The face or bottom of the insert 10, as stated, is in the shape of a quarter circle, so that when said face or bottom comes in contact with the seat 14, under pressure, said seat or face conforms with the contour of said valve seat, thus forming a positively leakproof joint.

While I have thus described my invention with great particularity, it will'be clear that the same may be modified throughout a wide range. I accordingly do not limited'to the exact details of construction described and illustrated, but reserve the right in practice to make any and all modifications thereof that fall within the scope of the appended claims. 1

I claim as my invention: 1. A valve construction comprising in combination, a valve seat, a valve stem adapted to be moved relatively to said seat, a valve capassociated with said stem, said cap being provided internally with a tapered portion, a plano-convex annular internally tapered resilient insert positioned in said cap, said insert having. its plane portion hollowed-out, an externally tapered sleeve mounted on said stem, and meanson said stem for clamping said sleeve to saidt cap.

2. A valveconstruction comprising in combination, a valve seat, a valve adapted to be moved relatively to said seat, said valve comprising a cap, an insert in said cap, said plane portion, cut away to provide an air cushion, closed by said cap, and clamping means for clamping said insert to said cap, said cap and said clamping means having reversely positioned propose to be tapered portions for preventin the forcible removal of said insert from sai cap. 1

3. In a valve, a seat therefor, a stem for said valve adapted to move relatively with I said seat, a cap adjustable on said stem, said. cap having aninwardly tapered flange, a plano-convex "annular; insert in said cap, said insert having its upper curved portion in engagement with said tapered flange, said insert being internally tapered from its convex portion to its plane portion, and an externally tapered flanged frusto-conical clamping member adapted-to haveitstapered portion engage the tapered ortion of said insert, and its flange engage tlie convex portion of said insert. I I

4. An insert adapted for special use in connection with a valve, said insert comprising an annular plano-convex member, ta pered internally from its convex portion to its plane portion, ing hollowed out, being curved substantially in the arc of a quarter circle. j j i p 5. In a valve, in combination, an insertin said valve, said insertcomprisingan annular plano-convex member, tapered internally from its convex portion to its'plane portion, said plane portion being-hollowed-outfand its convex portion being curvedsubstantially in the arc of a quartercircle, a base, said base being cutaway to provide a tapered fluid inlet, and a ledgeconcaved at its top and bottom, 7 ing adapted to obstruct the velocity of the fluid as it enters said inlet and uide said 1 fluid, the top concaved. portion of said seat being of substantially greater-length than the said plane portion beand its convex portion and its edge convex, said ledge fbe-- bottom concaved portion of said ledge, wliere j by scoring of said seat-may efiectively be prevented.

6. In a valve construction, injcolnbin'ation, an insert in said valve, said insertcomprismg an annular plano-convex m ember, ta-

pered-internally from "its convex portion to its plane portion,

'- said plane portion" being hollowed-out, and k its convex portion f being curved. substantially inthe arc of a quarter circle, a seat, said seat comprising a cyw h a tap d lindric'al member provided fluid inlet, a ledge extending internally from said member, said ledge being concaved at its top and bottomand-convexat its edge a cap associated with said seatfthe' top concaved portion of said ledge beingsubstantially longer than said bottomroncaved portion, which top portion, when said valve is closed, being adapted to'coactwitli said seat to form a fluid seallalo ng the entire length of said concaved portion. j In testimony whereof I have signedlmy name to this specification.

A G.- BIE E MANN 

